Stapling machine



May 5, 1942.

s. A CROSBY STAPLING MACHINE Filed July l0, 1939 3 Sheets-Sheet l IPIIII IIII I I l *Dn V.. I I I I y I wdm .I A \I/ m :v

mw m Vhu 1 @mi I r.

-May 5, 1942. s, A, CRQSBY 2,281,557

' STAPLING MACHINE Filed July lO, 1939 3 Sheets-Sheet 2 ATTORNEY 4 May 5, 1942. s. A. CROSBY STAPLING MACHINE Filed July 10, 1939 5 Sheets-Sheet 3 N ENTOR um nmkm k RQ @fr BY ATTORNEY Patented May 5, 1942 l STAPLING MACHINE Stephen A. Crosby, Jackson Heights, N. Y., as

signor to Speed Products Company, New York,

Application July 10, 1939, Serial No. 283,692

1l. Claims. V (Cl. 1 3) The present invention has to do with stapling machines and particularly is concerned with a long reach stapling machine. The object of the invention is realized in providing an eiective long reach stapling machine having spaced and reinforced longitudinally arranged andy transversely spaced vertical guide wings comprising stop means cooperating with a resilient cantilever beam to limit upward displacement of the staple and staple ejector plunger carrying arm vertically guided by the spaced wings and flxedly retained by and overhanging the free end of the beam. Further objects, advantages, and functional and structural aspects of the invention will be apparent from the following detailed description viewed in the light of the accompanying drawings wherein:

Fig. l is a perspective view of the 'long reach stapling machine according to my invention illustrating the staple carrying arm in a partially opened relation and the supporting cantilever beam in its normally raised position.

Fig. 2 is a side elevational view of Fig. 1 illustrating the staple carrying arm partly broken and partly in section.

Fig. 3 is a plan view of Fig'. 2.

Fig. 4 is a side elevational View of the long reach stapling machine showing the arm thereof depressed against the anvil of the base and its staple ejecting plunger raised.

Fig. 5 is a view similar to Fig. 4 showing the staple carrying arm and the staple ejecting plunger thereof depressed.

Fig. 6 illustrates an exploded view of the base, the cantilever spring, and the braces or wings for guiding the staple carrying arm.

Fig. 7 is a sectional view on the line l-I of Fig. 3.

Fig. 8 is Va plan view of the longr reach stapling machine with the cover for the staple magazine of the staple carrying arm swung to a fully opened position.

Fig. 9 is a side view of Fig. 8 partly broken away to illustrate the manner in which the rear part of the beam serves to limit rearward displacement of the pivoted closure.

Figs. l0 to 12 are perspective views of th plunger, intervenor, and mount, and

Figs. 13 to 16 inclusive are side views showing the progressive action of the stroke control mechanism during a complete down stroke of the plunger and during the beginning of the return stroke thereof.

Illustrative of the embodiment dlsclosed,'1the long reach stapling machine is generally denoted L and comprises a channeled sheet metal base B, spaced sheet metal wings W, a staple carrying metal arm'or casing A and a sheet metal support or cantilever beam C to which the arm A is xedly secured. Y

The wingsA W are relatively elongated members and are appreciably longer than the length of the staple carryingl arm A. These wings each include a longitudinally disposed reinforcing bead I.

.` The rear portion of these wings include an inwardly turned perforated ange II mounted on the perforated offset tail portion I2 of the lbeam C which in turn is located on the rear perforated part I3 of base B and suitable fastening means I4 in the form of rivets as shown are utilized to secure tail I2 'fixedly between inwardly extending flanges II and the rear portion I3 of the base.

With the rear ends II of the wings W rmly secured to the base, the lower edges I5 thereof are appreciably spaced from the upper surface of the'base. As shown the wings are tapered and each includes at its free ends a depending curved stop lip I 6 cooperating with the marginal portions of the front end I'I of the cantilever beam '1 C to limit upward displacement thereof.

The magazine M of arm or casing A is iixedly anchored to the forward end I'I of beam C which has its body I8 oiTset in respect to the rear portion I 2, the arrangement being such that the inherent resiliency of the sheet metal body I8 automati'cally retractsl the latter to position the front end I1 of the beam against the stop lips I6. Thus the forward end of the beam is normally elevated and in such relation the front `part of the staple carrying arm A in part projects forwardly of the front end of the resilient cantilever beam C since the bottom wall I9 of magazine M is xedly secured to the front end lI'l of the beam by suitable hollow rivets 2'0 struck out of end Il and riveted to the bottom wall of the magazine as shown.

According to the invention the well known Swingline type of arm A is shown mounted at the front end of the beam although other types of Staple and staple ejecting plunger carrying arms or casings may be employed. However for purposes of vdisclosure arm Amay be said to comprise (Fig. 2) the magazine M containing the iixed rail R on which staples 2| are slidably guided and urged forwardly by a suitable follower F svlidably interlocked with the rail and having a hook H (Fig. 8) towhich the lower end 2-2 of a spring 23 is connecte The 'intermediate portion' 24 of 'this spring 23 is trained over a roller k25 rotatably carriedrk by a slidably retained pin 26' carried by the swingvable cover 2B of arm A for the magazine M. The cover and magazine have complementary locating means in the form of a lug 28 and recess 29 for properly locating the cover relative to the magazine upon closing of the cover which has ears 30 rotatably mounted on the rear fulcrum pin 3| carried by the magazine. It should be observed however that the end 34 of the upper reach 32 of the normally compressed spring 23 is retained by a lug 33 struck out of the cover 26.

The roller 25 cooperates to urge latch 34 slidably guided in slots 35 in the spaced sides of the cover 26 and in the spaced sides of the xed front sheath 21 which constitutes the fore part of cover 2B to disengageably interlock with notches 3B (Fig. l) in the extensions 31 of the magazine when the cover is closed, that is, swung towards and against the magazine. Thus with the cover closed the follower R is urged forwardly by the looped spring 23 to present the foremost staple in the magazine in the vertical raceway 40 and underneath the rectilinearly movable blade 4| of a staple ejecting plunger P vertically and slidably guided at the front end of the cover and normally held in a raised relation by the leaf spring 42. The staple carrying arm A has been just briefly described since it may be substituted by other functionally equivalent means for containing staples and for ejecting one of the latter therefrom at a time when the cap 45 carried by the plunger is depressed.

If the arm is closed the plunger P is in a normally raised position and the` beam C is against the stop lips |6 of wings W. The relatively long gap G is defined by magazine M and the beam C with the upper surface of the base to permit the insertion of paper or any other material to be stapled an appreciable distance into this gap and such entry thereof can be made at least to the extent of the length of this gap which is immeasurably greater than the length of the staple carrying arm.

With several sheets of paper or the like to be fastened, inserted into the gap G and positioned on the base, the reciprocably guided plunger in the cover 25 may be actuated by applying a downwardly directed pressure to cap 45. This action at first merely exes the beam, that is, the forward end I1 thereof moves downwardly away from lips I6 (Fig. 4) until the magazine M strikes the sheets (not shown) to be stapled above the xed anvil 46 carried by the base. Upon continued application of the downwardly directed pressure on cap 45, the plunger P slides downwardly relative to the arm A (Fig. and the blade 4| thereof drives the foremost staple out of raceway 4|) in the magazine through the sheets of paper or the like to be clinched thereagainst by the 'anvil and of course at this time the forward end of the beam remains curved and exed as shown.

Where the stapling operation is completed, the

operator removes the downwardly directed pres-` sure on the cap, and the free end of the beam retracts or recoils carrying with it arm A. Therevafter stops I6 limit such retraction of the beam.

and during the retraction of the beam the plunger is restored to its normally raised position by spring 42.

Since the cover may be swung rearwardly of the magazine in the manner indicated in Fig. 9, of course after the slidable latch 34 has disengaged from the magazine, the magazine is fully opened` and can ,be conveniently supplied. with fil staples. In such position of the cover however the rear end of the cap which may be of rubber is seated on the intermediate part of the beam which constitutes stop means to limit rearward swingable movement of the cover.

A staple control mechanism of the type disclosed in my copending application, S. N. 146,708, led June '1, 1937, may be employed to allow the ejection of the staple in the raceway 40 on each complete downward stroke of the plunger and in this connection the slidable and tiltable intervenor 50 normally urged forwardly by spring 5| is against abutment 52 of the plunger P when the latter is in its normally raised position (Fig. 2) and when the plunger is moved downwardly thev intervenor 5|] automatically is shifted forwardly between the abutment 52 and the fixed mount 53 which constitutes stop means forv abutment 52 of the plunger in its normally raised position. Thus after a slight downward displacement of the plunger a complete return stroke cannot be made. But such complete return stroke `can be made if the plunger is fully depressed since on the down stroke inclined cam faces 54 of the spaced sides of the plunger shift lugs 55 of the intervenor onto the lower stepped portions 5G of the fixed mount 53. Hence the intervenor 50 is held fully out of the way until the complete down stroke of the plunger has been completed. However on the retraction of the plunger, horizontal walls or abutments 58 in the sides of the plunger raise lugs 55 out of the lower stopped portions 55 and onto the upper steps 51 of the mount at which time abutment 52 is stopped against the fixed mount 53, and spring 5| retracts the intervenor to contact the rear face of this abutment 52.'

Where an incomplete down stroke is made, blade 4| closes the raceway 4|. Thus a complete down stroke is rst necessary before a complete return stroke can be made at which time a staple can be urged into raceway 40 by the follower R since on a partial downward stroke of the plunger the driving blade of the latter serves to close raceway 40.

As many changes could be made in the above described construction and many widely different species or structural embodiments could be devised without departing from the scope thereof, it is intended that allmatter hereinbefore described in the specification and illustrated in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

I claim:

1. In a long reach stapling machine, a base, wing means carried by said base, a sensibly resilient cantilever beam secured to said base and substantially coextensive with the length of said wing means and having a front movable end limited in one direction of movement by said wing means, and staple carrying and ejecting means mounted exclusively on said beam.

2.In a stapling machine, a base, an anvil sustained by said base, spaced wings carried by said base and defining a gap, stop means extending from said wings, a relatively thin cantilever leaf spring .substantially coextensive with the length of said wings and bridging said gap transversely thereof and having a forward end normally yieldingly abutting said stop means and a rearwardly disposed fixed end, and staple carrying and ejecting means Xedly carried by said front end and adapted upon downward application of pressure thereon to shift said forward end ldownwardly and away'from said. stop means to arrange said staple carrying and ejecting means and anvil in operative alinement, said front end automatically retracting pursuant to removal of said pressure to abut said stop means for limiting bodily retraction of said staple carrying and ejecting means.

3. In combination, an elongated base having an anvil at the forward end thereof, wings disposed vertically relative to said base and transversely spaced thereof to define a gap, a cantilever leaf spring support horizontally bridging said gap and substantially coextensive with the length of said wings and having a rear fixed end and embodying an intermediate portion and a front end spaced from said base, stop means above said base, said front end normally abutting said stop means and characterizing a seat, and staple ejecting means mounted on said seat and in part overhanging the latter and said wings and vertically and movably guided in said gap by and between said wings for cooperating with said anvil upon application of downward pressure thereon whereby said front end is flexed downwardly and away from said stop means.

4.In a long reach stapling machine, a base, spaced wings disposed longitudinally of and carried by said base, a cantilever beam having a rear end xedly interposed between said wings and base and including a free endv abutting said wings, and staple carrying and ejecting means secured to said free end.

5. In a stapling machine, an elongated base, wing means superimposed 'in respect to and in part secured to said base and including stop means, a resilient beam having a rear end fixedly interposed between said Wings and base and including a free end abutting said stop means, and staple carrying and ejecting means secured to said free end and movably guided by said wings.

6. In combination, a base, guide means carried by said base, a leaf spring substantially coextensive with the length of said guide means and having one end secured to said base and having a free end normally yieldingly abutting said guide means, and staple ejecting means mounted on said free end.

7. In combination, an elongated base having an anvil, wings disposed vertically relative to said base and traversely spaced thereof and having rear portions secured thereto and remaining portions spaced therefrom, a cantilever spring having a rear portion xedly secured relative to said base and including a front portion spaced from and normally removably abutting at least one of said wings, and staple ejecting means mounted in part on and overhanging said front portion for cooperating with said anvil.

8. In combination, an elongated base having an anvil, wings disposed vertically relative to said base and traversely spaced thereof and spring substantially coextensive with the lengthl of said wings and having a rear portion iixedly secured relative to said base and including a front portion appreciably spaced from and normally yieldingly abutting at least one of said wings, and staple ejecting means interposed be- -tween said wings and mounted in part on and overhanging said front portion for cooperating with said anvil.

9. In combination, an elongated base having an anvil, wings disposed vertically relative to said base and traversely spaced thereof and having rear portions secured thereto and intermediate and front portions spaced therefrom, lips depending from said front portions, a cantilever spring having a rear portion xedly secured relative to said base and including av depressible front portion normally and yieldingly abutting said lips and staple ejecting means mounted in part on and overhanging vsaid front portion and movably guided by and between said wings for cooperating with said anvil.

10. In combination, an elongated base having an anvil, wings disposed vertically relative to said base and transversely spaced thereof to define a gap and having inwardly turned flanges, lips depending from said wings at the forward ends thereof, a cantilever offset sensibly resilient support horizontally bridging said gap and having a rear portion interposed between said base and flanges and secured thereto and embodying an intermediate and front portion spaced from said base, said front portion normally removably abutting said lips and characterizing a seat, and staple ejecting means mounted on said seat and vertically and movably guided in said gap by and between said wings for cooperating with said anvil. g

l1. In combination, an elongated base having an anvil, wings disposed vertically relative to said base and transversely spaced thereof to dene a gap and having inwardly turned flanges, lips depending from said wings at the .forward ends thereof, a cantilever offset sensible resilient support disposed along the length of said wings and horizontally bridging said gap and having a rear portion interposed between said base and flanges and secured thereto and embodying an intermediate and front` portion spaced from said base, said front portion nor.- mally removably abutting said lips and characterizing a seat, ribs extending longitudinally along said wings to reinforce the latter, and staple ejecting means mounted in part `on and overhanging said seat and vertically and movably guided in said gap by and between said wings for cooperating with said anvil. A

STEPHEN A. CROSBY. 

